Mounting device for tubular articles



Feb. 15, 1938. w. R. ALLEN, 3D 2,108,399

MOUNTING DEVICE FOR TUBULAR ARTICLES Filed March 27, 1937 INVENTOR.I'V/ZZM/ ffflddfll Alli/V E ATTORNEY.

Patented Feb. 15, 1938 UNITED STATES PATENT OFFICE MOUNTING DEVICE FORTUBULAR ARTICLES Application March 27,

3 Claims.

This invention relates to means for mounting tubular articles and moreparticularly to a device for securing radio coil forms and theirassociated shield cans to a chassis.

In the past it has been customary to provide coil forms withlongitudinally extending threaded posts which were riveted to the end ofthe coil form, and the shield cans were similarly constructed. The radiochassis was punched to receive the numerous mounting posts and anindividual operation was required to thread a fastening nut on each postand so secure the respective articles to the chassis. The invention tobe described herein discloses a simple fastening device for suchpurposes which adapts itself to mass production methods, and whichrequires but one mounting operation to secure both a coil and its shieldcan to a chassis.

One of the objects of this invention is to pro vide improved means formounting tubular articles which shall be more efiicient in operation andconvenient in installation.

Another object is to provide a mounting member which is more simple inconstruction.

A further object is to provide a mounting member which may be moreeconomically produced.

Still a further object is to provide a mounting member for radio coilsand shield cans which requires but a single attaching operation tosecure both articles.

Other objects and advantages will in part be specifically stated and inpart be obvious when the following specification is read in connectionwith the drawing, in which:

Fig. l is a perspective view of the improved device; Fig. 2 is a viewshowing the device as applied to a radio coil; and Fig. 3 is a view showing a shield can and coil partially broken away to illustrate the modeof operation of the mounting device.

Referring in more detail to Fig. 1, there is shown a circular body I ofsheet metal having integral depending pins 2 and a struck up centralcollar 3, provided with internal threads 4. The device may be formed ina single stamping operation and may have the threads 4 subsequently cut,or if the metal is relatively soft, a self-tapping screw may be employedin cooperation with the device to form the threads.

In Fig. 2 there is shown a conventional tubular radio coil form 5 havingwindings thereon. The coil form 5 may be of any suitable insulatingmaterial such as waxed paper, and has an end flange 6 formed thereon bycrimping or otherwise. The mounting device I is inserted in the open endof the coil form 5 with the pins 2 pro- 1937, Serial No. 133,323

jecting downwardly and is pushed through the form until the pins contactthe flange 6. Continued pressure on a suitable inserting tool (notshown) causes the pins 2 to pierce the coil form 5 at the intersectionof the flange 6 and the pins are bent outwardly against the resistanceof the radio chassis I (Fig. 3). A screw 3 is inserted through anopening in the chassis 2' and engages the collar 3 of he mounting deviceto draw it down securely. The pins 2 cut into the chassis materialsufliciently to resist any subsequent turning of the coil form.

As shown in Fig. 3, the coil form 5 may be placed in a shield can 9having a bottom wall or web suitably apertured, and both elements may besecured to the chassis 1 in the manner above described. The mountingthus provided is economical in cost, and reduces the assembly labor aswell as obviating the cost of providing a plurality of fastening membersas in the former practice, to achieve the same object.

It will be apparent that many changes and modifications may be made byanyone skilled in the art without departing from the spirit and scope ofthe invention as expressed in the following claims.

1. In combination, a tubular article having an inwardly extending flangeformed at one end, a support, a mounting element within said article, aplurality of deformable pins on said element adapted to pierce saidarticle and deform against said support, and means for urging togethersaid element and said support.

2. In combination, a tubular article having an inwardly extending flangeformed at one end, a support, a mounting element within said article, aplurality of deformable pins on said element adapted to pierce saidarticle adjacent the base of said flange and radially deform againstsaid support, and means for urging together said element and saidsupport.

3. In combination, a tubular radio coil form having an inwardlyextending flange formed at one end, a support, a mounting element withinsaid form having a central opening therein, a plurality of deformablepins on said element, a shield can enclosing said coil form and having abottom portion extending under said form, and a screw extending throughsaid support and said bottom portion of said shield can and engagingsaid mounting element at the central opening thereof, whereby said pinsmay be caused to pierce said coil form and deform radially.

WILLIAM RUSSELL ALLEN, III.

